brass and mahogany clinometer
Date: 19th Century
Inventory Number: 5182
Classification: Clinometer
Subject:
Maker: American ?
User: Andrew Nichols ? (1837 - 1921)
Cultural Region:
Dimensions:
8.3 × 4.5 × 70.9 cm (3 1/4 × 1 3/4 × 27 15/16 in.)
Description:
Bubble level and brass rod on rectangular mahogany base.
The long base is square in cross-section and has brass end caps.
The brass road is engraved with a scale having values ranging from 10° to 90°. It may be made to stand perpendicular to the base, or secured along the top of the base using the wing screw at its top end. The brass bubble level, which is hinged at one end, may be attached to the brass rod using the wing screw opposite the hinge. The bubble level has an oval glass window.
The long base is square in cross-section and has brass end caps.
The brass road is engraved with a scale having values ranging from 10° to 90°. It may be made to stand perpendicular to the base, or secured along the top of the base using the wing screw at its top end. The brass bubble level, which is hinged at one end, may be attached to the brass rod using the wing screw opposite the hinge. The bubble level has an oval glass window.
Signedunsigned
FunctionFor measuring the angle of inclination between two points.
The user first places the base of the clinometer on a plane table, parallel to his direction of sight. He then brings the brass rod into a vertical position. Next, he adjusts the tilt of the table until the bubble level is pointing at the point of interest. Finally, he raises the end of the bubble level until the bubble is at its center, and tightens the end of the level against the vertical rod. The reading on the rod is the angle of inclination between his starting position and the point of interest.
The user first places the base of the clinometer on a plane table, parallel to his direction of sight. He then brings the brass rod into a vertical position. Next, he adjusts the tilt of the table until the bubble level is pointing at the point of interest. Finally, he raises the end of the bubble level until the bubble is at its center, and tightens the end of the level against the vertical rod. The reading on the rod is the angle of inclination between his starting position and the point of interest.
ProvenanceFrom David P. Wheatland, January 1975. Purchased by Wheatland from Andrew Nichols, together with other Holyoke material.